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How to recognise fake fossils:

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collect/fossilfakes.htm​​​​​​​

  

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The rocks and minerals of Minecraft​​​​​​​​​​​​​​

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SAPPHIRE CRYSTALS - Isle of Mull, Scotland

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Home > PREVIOUSLY SOLD ITEMS > PREVIOUSLY SOLD BRITISH MINERALS, ROCKS AND RELATED ITEMS

SAPPHIRE CRYSTALS

Nuns’ Pass, Carsaig, Isle of Mull, Scotland
 
The blue variety of corundum is sapphire, the red variety being ruby.  Rare sapphires can be found on the Isle of Mull as blue, tabular crystals within an igneous sill intruded into the surrounding rock when the island was an active volcano.

The chemistry of the sapphire formation is complex but is a result of high temperature metamorphism of rock fragments (xenoliths) contained within the magma that formed the sill.

The surrounding rock has been removed by acid to reveal the crystals.

 
Click on a picture for a larger image

Size:  5 x 5 x 4 centimetres
Weight:  130 grams

PRICE: £0.00
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